Shutter for photographic cameras



Nov. '18, 193.0. s. HIRSCH 1,781,923

SHUTTER FOR PHOTOGRAPHIC CAMERAS Filed March 29, 1928 v Fig.1 25

' INVENTOR ATTORNEY Patented Nov. 18,

means SIDNEY HIE-SCH, OF ITEVI YORK, N. Y

The object of the provide a shutter fo in which the shutte ASSIGNORTG PEOTOMATON N. Y., A CORPORATION OF NEW YORK SHUTTER FOR- PHO'I'OGR-API-IIC CAMERAS Application filed March 29, 1928.

present invention to r photographic cameras 1' is given an operative movement, the movement in each direction exposing and closing the lens, the shutter embodying means whereby the light aperture may be adjusts The shutter is positively driven through operative connections with a cam or the like by simplicity of construction and so as to be adapted f upon reels of DGCGSSZUIY elements.

and is characterized durability or use in cameras acting sensitized strip, in which durability and permanence of adjustment are The invention will be described with reference to the accompanying drawing, in

which- Figure 1 is a side elevation of an embodiment of the invention, and

Figure 2 is a front In the drawings I elevation of the same. have diagrammatically shown a lens mounting at A from which laterally projects a bracket B provided at its lower end with a boss 1, the latter carrying a fixed shaft 2.

shaft 2 is a sleeve 3 Mounted to oscillate upon having an annular head 5 upon which is secured by screws or pins the primary fan-like shut-ter front of the shutter member 4 member 1. In and upon shaft 2 me I be secured an abutment ring and a second abutment ring 6 the shaft i'earwardly of The fan-like shutter with an intermediate image aperture 7, in

wings 8, 8 pivoted wing is apertured to receive the screw may be placed on sleeve member A is formed iront of which are placed two adjusting at 9. Each adjusting a set screw 10,

passing through primary shutter member at and having at its rear end a nut 11. By such means the adjusting i ings may be securely clamped n ad usted position upon the primary shutter member. The annular head 3 thereto a depending of sleeve 3 may have secured arm 12 carrying a balance weight 13. The weight may be adjusted lengthwise relatively to arm 12, the arm being formed with A set screw 14 may a longitudinal slot 12*. be employed to secure the weight in its adjusted position.

Bracket B is form ed with a horizontal ex- Serial No.

tension 15 which INC OF IJEXV YORK,

is aperturcd to receive a shaft 16 on which mounted a lever 17, the

lever being shaft 16. catory cam arm 19 the vided with oppositely pi held in pl ace by a coliar 18 on Lever 17 is driven by a reciprolatter being proaced contact studs 20 for engagem nt by a cam 21. Cam 21 is mounted upon a be driven in any passes through formed in cam arm 19, a held in position through face with the cam and t shaft 22 sui table a long and the latter may manner. Shaft 22 'itudinal slot 19 nd the cam arm is its contactat one hrough its contact at the opposite face with a collar 23 on shaft 22. 0am arm 1 9 is pivota with lever 17.

lever 1 lly connected at 2% is connected to a link 26 comprising upper and lower a);-

ially intermediate member tures of the upper the length of the then held against its lower end link 26 is c and socket connection 28 29 projecting from sleeve thr at the upper end of link 26 is, like and socket connection.

In the one-ration of "he d v tion shaft of cam 21. in turn an up and dmvn ment will be given lever tion as shoivnin Figure 2 ter member will move to aperture 7 comes into r mounting A, the Pl'llllil continuiii 'ight han d portion of es the lens. in a return the image aperture is register with the lens fol ing of the lens by the is the shutter, the members position shown in Figure or a plurality of blades 30 may i the primary shutter member A strengthen the same or act as me plemental to the men'ibcrs the Having described my J its nioven'ient to size of the image aperture.

apertured threaded members and an eaded in the aperand lower members so that link may be adjusted and movement by nuts 2?.

At onnected by a ball with a crank arm 3. @0111 ction 25 se. a ball move- 1.7. From its posithe primary shutthe left until image er with the lens shutter member the left until the in member shields stroke of cam arm 19 again brought into lowed by a shieldl't hand portion of eing bror i'ht to the 2.

If desired. one

to balance or inbers sup 8, 8 for ad usting invention what I inc claim and desire to secure by Letters Patent is as follows 1. In shutters for photographic cameras, a primary shutter member formed With an intermediate image aperture and a lens shielding portion at each side of said aperture, a fan blade mounted on the" shutter member fer adjusting the size of the image aperture, a rotary shaft, a cam on the shaft, a cam arm, and lever and link connections intermediate the arm and the primary sh utter member.

2. In shutters for photographic cameras,

"a fan-like blade formed with a central image aperture and Witha shutter shielding portlon at each sl de of said aperture, fan blades carried by said shutter member and adjustable to vary the size of the image aperture,

a sleeve carrying the shutter member, a shaft for supportingsaid sleeve, a rotatable shaft, a cam on the shaft, a cam arm, a lever pivotaily connected to the "cam arm and a link operatively connecting the lever and the sleeve, substantially shown and described. In testimony whereof, I have signed my name to this specification.

SIDNEY HiRseH. 

